<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="" method="get" enctype="application/x-www-form-urlencoded">
    用户名：<input type="text" name="username"/><br/>
    密码：<input type="password" name="password"/><br/>
    验证码：<input type="text" name="checkNode"/><br/>
    提交：<input type="submit"/>
</form>
</body>
</html>